hotspot/test/runtime/SharedArchiveFile/SharedSymbolTableBucketSize.java

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/**
 * @test
 * @requires vm.cds
 * @bug 8059510
 * @summary Test SharedSymbolTableBucketSize option
 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 */

import jdk.test.lib.cds.CDSTestUtils;
import jdk.test.lib.process.OutputAnalyzer;

public class SharedSymbolTableBucketSize {
    public static void main(String[] args) throws Exception {
        int bucket_size = 8;

        OutputAnalyzer output =
            CDSTestUtils.createArchive("-XX:SharedSymbolTableBucketSize="
                                       + Integer.valueOf(bucket_size));
        CDSTestUtils.checkDump(output);

        if (!CDSTestUtils.isUnableToMap(output)) {
            String s = output.firstMatch("Average bucket size     : .*");
            Float f = Float.parseFloat(s.substring(25));
            int size = Math.round(f);
            if (size != bucket_size) {
                throw new Exception("FAILED: incorrect bucket size " + size +
                                    ", expect " + bucket_size);
            }
        }

        // Invalid SharedSymbolTableBucketSize input
        String input[] = {"-XX:SharedSymbolTableBucketSize=-1",
                          "-XX:SharedSymbolTableBucketSize=2.5"};
        for (int i = 0; i < input.length; i++) {
            CDSTestUtils.createArchive(input[i])
                .shouldContain("Improperly specified VM option")
                .shouldHaveExitValue(1);
        }
    }
}